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Aquarium filters – the key to a crystal clear and balanced aquatic environment

Aquarium filters play a fundamental role in maintaining the ecological balance. They remove contaminants, regulate toxic compounds (such as ammonia and nitrites), and provide stable living conditions for fish. The right filter improves oxygen circulation, prevents water clouding, and reduces the need for frequent replacement.

Types of aquarium filters

Internal filters

  • Compact and easy to install
  • Suitable for small and medium-sized aquariums
  • Provide mechanical and biological filtration

Some models offer flow rate adjustment, a locking system and the possibility of accessories

External filters - canisters

  • Ideal for large aquariums with many inhabitants
  • Powerful and located outside the aquarium
  • Offer multi-layer filtration (mechanical, biological, chemical)
  • Provide quiet and effective operation under high load

Filter sponges

  • Operate via an air pump
  • Primarily for biological filtration
  • Excellent choice for breeding aquariums and shrimp tanks
  • Soft and safe for small or sensitive fish

Sump systems

  • Extremely effective for large or specialized aquariums
  • Have a large volume and various compartments for filtration materials
  • Allow for easy maintenance and customization

How to choose the right filter for your aquarium?

The choice of filter depends on several key factors:

  1. Aquarium volume – each filter is sized for specific liters
  2. Fish population and species – more fish = higher load
  3. Aquarium type – freshwater, marine, plant or bred
  4. Pollution level – from food, plants, waste

Tip: The combination of mechanical, biological and chemical filtration gives the best results and a stable ecosystem.

Why choose filters from us?

  • A wide variety of internal and external aquarium filters
  • Models with high performance, long-lasting operation and warranty
  • Detailed descriptions with recommendations for volume, inhabitants and functionalities
  • Professional advice and support when choosing

Browse our selection of aquarium filters and choose the most suitable solution for a clean, healthy and beautiful underwater ecosystem!

Supplement your filtration with essential accessories


Aquarium lighting – for healthy plant growth and a beautifully lit environment
Aquarium heaters – provide the ideal temperature for tropical inhabitants
Water tests and preparations – monitor water parameters and prevent problems in time

External filter Sunsun HW-704B is suitable for both marine and freshwater aquariums. The canister is powerful, efficient and at the same time quiet. It is easy to install and maintain, has three baskets for different types of filter media - for mechanical, biological and chemical filtration. The fil..
299.00 лв.
Sunsun HW-3000 UV 9W external aquarium filter is a representative of the new generation of Sun Sun brand filters with flow rate adjustment option.Main advantages Sunsun HW-3000 UV- Variable pump that works almost noiselessly- LED display for easy and efficient control- Ceramic axis for long-term and..
395.00 лв.
BIO Ceramic filter sponge combines three different types of filtration in one product, ensuring maximum efficiency and stable water quality.Three-Stage FiltrationOrganic-Chemical Filtration – The patented air-lift system provides optimal turbulence and oxygenation of the water while simultaneously r..
29.00 лв.
Biological filter sponge for aquariums up to 350l innovative filter combines three different types of filtration in one product, ensuring maximum efficiency and stable water quality.Three-stage filtrationOrganic-chemical filtration – The patented air lift provides optimal turbulence and oxygen satu..
40.00 лв.
Perhia EH - 1500U external filter is suitable for both marine and freshwater aquariums. It is powerful, extremely reliable and at the same time quiet. The PERIHA EH series filter is self-priming with a touch button, easy to install and maintain, has four baskets for different types of filter media -..
398.00 лв.
The Perhia EH - 1500 external filter is suitable for both marine and freshwater aquariums. It is powerful, extremely reliable and at the same time quiet. The PERIHA EH series filter is self-priming with a touch button, easy to install and maintain, has four baskets for different types of filter med..
378.00 лв.
Nitrate Remover up to 1000l is ion exchange resin reduces high nitrate levels and prevents and removes unwanted algae growth. Nitrate Remover - ion exchange resin increases resilience and improves fish condition, reduces aquarium maintenance costs, extends the time between changes. For repeated use...
88.00 лв.
Nitrate Remover 500l - ion exchange resin reduces high nitrate levels and prevents and removes unwanted algae growth. Nitrate Remover - ion exchange resin increases resistance and improves fish condition, reduces aquarium maintenance costs, extends the time between changes. For repeated use. After ..
53.60 лв.
Black Peat Granulate - black peat pearls 1l, for lowering pH levels.The new black peat pearl granulate is a natural cation exchanger made from selected black peat. Discusfood guarantees safe use in aquariums. Peat products from Discusfood are only harvested from large forest areas, far from the city..
39.00 лв.
Glass Ceramic Bio Pearls filter media made of high-quality sintered glass for crystal-clear water. Extremely porous with a huge surface area for optimal colonization with filter bacteria. Approx. 1,500 m² / l settlement surface, 10 to 12 times higher than with conventional ceramic rings! High effic..
16.00 лв.
Glass Ceramic Bio Pearls filter material made of high-quality sintered glass for crystal-clear water. Extremely porous with a huge surface area for optimal colonization with filter bacteria. Approx. 1,500 m² / l settlement surface, 10 to 12 times higher than with conventional ceramic rings! High eff..
76.00 лв.
Glass Ceramic Bio Ring M - 1L glass ceramic, filter media for canisters and sumps.Baked glass ceramic is among the most highly efficient biological filter materials available, due to its enormous surface area in relation to volume. This property is obtained by heating the glass to temperatures at wh..
14.00 лв.
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